>>53314527Because for all of that pomp and circumstance the Royal Unovan Bloodline boiled down to 8 men and a literal feral child. It's like those people who loved to claim "I can trace my ancestry back to royalty!" to make themselves feel special. Wild West is cliche but at least it offers up the vast expanses that Arceus had.
Given all of the literal aliens [both planetary and dimensional] we have running around now, I'd base it around the height of the UFO era so we can potentially tie up Unova's relationship to Alola and possibly canonize Orre to some extent. You have abductions, bizarre creatures roaming the landscape and infecting local wildlife, people awakening to powers once relegated to pulp sci-fi and dime-store fantasy novels and an organization trying to either make sense of it all or nip it in the bud. A sort of modern mythology angle to offset the previous game.